2. Rhythmic Ventilation (Inspiratory Off Switeh)- Starting inspiration Medullary respiratory center neurons/are continuously active(spontaneous) Center receives stimulation from Peripheral and central receptors brain concerned with voluntary respiratory movements and emotion Combined input from all sources causes action potentials to stimulate respiratory muscles9 2. Rhythmic Ventilation (Inspiratory Off Switch) • Starting inspiration – Medullary respiratory center neurons are continuously active (spontaneous) – Center receives stimulation from –Peripheral and central receptors –brain concerned with voluntary respiratory movements and emotion – Combined input from all sources causes action potentials to stimulate respiratory muscles